Canon EOS-10D Review

Top of camera controls (left) - Exposure Modes

Top of the camera on the left hand side is situated the exposure
mode dial. This dial controls the manner of exposure operation be
it fully automatic, a preprogrammed scene composition, flexible
program or a range of manual and semi-automatic options.

Creative zone exposure modes

The five exposure modes will be more familiar (and preferred)
by most prosumer / professionals. All menu functions and camera settings
are available in these modes and can be used in any combination.

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Mode

Program Auto Exposure (Flexible)
Very similar to AUTO exposure but you have access to all the normal
manual controls, can set the ISO, exposure compensation, use AE
lock, bracketing etc. The Program AE on the EOS-10D is flexible,
that means that you can select one of a variety of equal exposures
by rolling the main dial (top of camera). Example:

Aperture Priority Auto Exposure
In this mode you select the aperture and the camera will attempt
to select the best shutter speed for a proper exposure (based on
the current metering mode). Aperture is displayed on the viewfinder
status bar and on the top LCD, roll the main dial to select different
apertures. A half-press of the shutter release causes the cameras
exposure system to calculate the shutter speed, if it's outside
of the cameras exposure range the shutter speed will blink. Available
apertures will differ depending on the lens used, the list below
represent 1/3 stop increments (40 total), 1/2 stop increments can
be selected through custom function 6.
F1.0, F1.1, F1.2, F1.4, F1.6, F1.8, F2.0, F2.2, F2.5, F2.8, F3.2,
F3.5, F4.0, F4.5, F5.0, F5.6, F6.3, F7.1, F8.0, F9.0, F10, F11,
F13, F14, F16, F18, F20, F22, F25, F29, F32, F36, F40, F45, F51,
F57, F64, F72, F81, F91 (exact range depends on lens used)

Full Manual Exposure
In this mode you select the aperture and the shutter speed from any
combination of the above (plus BULB for shutter speed, apertures limited
by the lens used). Top dial selects shutter speed, rear dial selects
aperture. Half-press the shutter release and the meter on the viewfinder
status bar and top LCD will reflect the exposure level compared to
the calculated ideal exposure, if it's outside of +/- 2EV the indicator
bar will blink either + or -.

Automatic Depth-Of-Field AE
This mode, seen before on other Canon EOS cameras automatically
controls the depth of field to ensure that all the subjects covered
by the focusing points, from those close to the camera to those
far away from the camera remain sharply defined (are within the
depth of field).

Top of camera controls (right)

Top of the camera on the right side is the main information LCD,
directly above this are four buttons (LCD panel backlight, AF/WB,
Drive/ISO, Metering/Flash compen). In front of these buttons is
the main dial and shutter release button.

Settings buttons are press once (you don't have to hold them),
roll a dial to change setting value and then half-press the shutter
release to return to shooting mode.

The table below shows the relationship between each of
the settings buttons and the parameters changed by either rolling the
main dial (top) or quick control dial (rear).

* Can only be selected if 'ISO Expansion' is set to 'On' in the camera
menu

Notable improvement:
AI Focus mode can now be selected in creative modes, Two new WB options
(Shade and Kelvin), Extended continuous shooting buffer (one more shot),
Expanded ISO sensitivity range (up to a maximum of ISO 3200 from ISO 1000
of the EOS-D60).

There were no lenses made specifically for the smaller sensor at the time of the release. You had to suffer with no real wide alternatives. it kinda was the 28-135 like john mentioned above. I used the 24-70 and had to get a 17-35 for the wide until the first 18-50 came out a year later.

(I know I am answering a really old message, but just in case it might be useful to someone later:)Unfortunately the 10D was Canon's last 1.6-crop camera that had the EF mount and not EF-S. So, when crop lenses like the zillion incarnations of the EF-S 18-55mm came out, they couldn't be mounted on the 10D.

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